Avast is the best free antivirus solution, you can even use facebook login and track your devices and reports online easily. http://www.avast.com/get/YxEpUBPJ
They both do okay. Really you get what you pay for and free AVs provide "decent" protection. I would go with Avast because it seems to do better with crypted malware. With free AVs it's really a matter of personal preference.
Avast is the best free antivirus solution, you can even use facebook login and track your devices and reports online easily. http://www.avast.com/get/YxEpUBPJ